"Everybody has a secret world inside of them. All of the people of the world, I mean everybody. No matter how dull and boring they are on the outside, inside them they've all got unimaginable, magnificent, wonderful, stupid, amazing worlds. Not just one world. Hundreds of them. Thousands maybe." -Neil Gaiman
The Sorting Hat has placed you in
In case you’re trying to keep track of the Infinity Gems;
Kevin Feige (President of Marvel Studios) stated that the Tessaract seen in The Avengers and Thor was actually an Infinity Gem, specifically the Space Gem.
The Aether seen in Thor: The Dark World is also one, although it’s yet to be confirmed exactly which one. Personally, I think it fits into the Reality Gem's power area.
Loki’s Staff, seen in Avengers, Thor, etc appears to have a gem. In Captain America: The Winter Soldier, a scene in the credits shows it being un-assembled digitally, possibly alluding to the gem in it being a Infinity Gem. I’d say it’d be the Mind Gem.
In Guardians of the Galaxy, the “Orb” item that Peter steals houses a purple gem, said to be the Power Gem by Feige.
That leaves us with just two; the Time Gem and the Soul Gem.